Read every character from stdin

input.swift

import Foundation

let stdin = FileHandle.standardInput

var term = termios()

tcgetattr(stdin.fileDescriptor, &term)
term.c_lflag &= ~(UInt(ECHO | ICANON))  // Noecho & Noncanonical
tcsetattr(stdin.fileDescriptor, TCSAFLUSH, &term);

defer {
    tcsetattr(stdin.fileDescriptor, TCSAFLUSH, &term);
}

var char: UInt8 = 0
while read(stdin.fileDescriptor, &char, 1) == 1 {
    if char == 0x04 { // detect EOF (Ctrl+D)
        break
    }
    print(char)
}